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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.net.intent;
import static org.junit.Assert.fail;
/**
* Set of test tools.
*/
public final class TestTools {
// Disallow construction
private TestTools() {
}
/**
* Utility method to pause the current thread for the specified number of
* milliseconds.
*
* @param ms number of milliseconds to pause
*/
public static void delay(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
fail("unexpected interrupt");
}
}
/**
* Periodically runs the given runnable, which should contain a series of
* test assertions until all the assertions succeed, in which case it will
* return, or until the the time expires, in which case it will throw the
* first failed assertion error.
*
* @param start start time, in millis since start of epoch from which the
* duration will be measured
* @param delay initial delay (in milliseconds) before the first assertion
* attempt
* @param step delay (in milliseconds) between successive assertion
* attempts
* @param duration number of milliseconds beyond the given start time,
* after which the failed assertions will be propagated and allowed
* to fail the test
* @param assertions runnable housing the test assertions
*/
public static void assertAfter(long start, int delay, int step,
int duration, Runnable assertions) {
delay(delay);
while (true) {
try {
assertions.run();
break;
} catch (AssertionError e) {
if (System.currentTimeMillis() - start > duration) {
throw e;
}
}
delay(step);
}
}
/**
* Periodically runs the given runnable, which should contain a series of
* test assertions until all the assertions succeed, in which case it will
* return, or until the the time expires, in which case it will throw the
* first failed assertion error.
* <p>
* The start of the period is the current time.
*
* @param delay initial delay (in milliseconds) before the first assertion
* attempt
* @param step delay (in milliseconds) between successive assertion
* attempts
* @param duration number of milliseconds beyond the current time time,
* after which the failed assertions will be propagated and allowed
* to fail the test
* @param assertions runnable housing the test assertions
*/
public static void assertAfter(int delay, int step, int duration,
Runnable assertions) {
assertAfter(System.currentTimeMillis(), delay, step, duration,
assertions);
}
/**
* Periodically runs the given runnable, which should contain a series of
* test assertions until all the assertions succeed, in which case it will
* return, or until the the time expires, in which case it will throw the
* first failed assertion error.
* <p>
* The start of the period is the current time and the first assertion
* attempt is delayed by the value of {@code step} parameter.
*
* @param step delay (in milliseconds) between successive assertion
* attempts
* @param duration number of milliseconds beyond the current time time,
* after which the failed assertions will be propagated and allowed
* to fail the test
* @param assertions runnable housing the test assertions
*/
public static void assertAfter(int step, int duration,
Runnable assertions) {
assertAfter(step, step, duration, assertions);
}
/**
* Periodically runs the given runnable, which should contain a series of
* test assertions until all the assertions succeed, in which case it will
* return, or until the the time expires, in which case it will throw the
* first failed assertion error.
* <p>
* The start of the period is the current time and each successive
* assertion attempt is delayed by at least 10 milliseconds unless the
* {@code duration} is less than that, in which case the one and only
* assertion is made after that delay.
*
* @param duration number of milliseconds beyond the current time,
* after which the failed assertions will be propagated and allowed
* to fail the test
* @param assertions runnable housing the test assertions
*/
public static void assertAfter(int duration, Runnable assertions) {
int step = Math.min(duration, Math.max(10, duration / 10));
assertAfter(step, duration, assertions);
}
}
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